Auxiliary pump arrangement for water cooled engines



Sept. 9, 1952 G. PIELSTICK 0 AUXILIARY PUMP ARRANGEMENT FOR WATER COOLED ENGINES Filed Feb. 8, 1950 '5 Sheets-Sheet 1 mvsuma- GUSTAV PIELSTICK ATTORNEYS p 1952 G. PIELSTICK 2,609,800

AUXILIARY PUMP ARRANGEMENT FOR WATER COOLED ENGINES Filed Feb. 8, 1950 3 Sheets-Sheet 2 Fig. 3

Fig.4

INVENTOR GUSTAV PIELSTICK .aawe N51 ATTORNEYS P 1952 G. PIELSTICK 2,609,800

AUXILIARY PUMP ARRANGEMENT FOR WATER CGOLED ENGINES Filed Feb. 8, 1950 3 Sheets-Sheet 3 N\\ l m INVENTOR GUSTAV PIELSTICK ATTORNEYS Patented Sept. 9, 1952 ULNI-TEDTIJPISTATES PA ENT OFFICE AUxrLrhRY PUMP ARRANGEMENT FOR.

' WATER COOLED ENGINES Gustav Pielstick, Saint Germain en Laye, France Application February 8, 1950, SerialN0.143,031

, In France February 15, 1949 This invention relates to' the installation of auxiliary pumps in diesel engineunits.

In high-powered high-speed diesel engines the oiland water-pumps used for, lubricating and cooling the engine absorb aconsiderable amount of power and are of correspondingly large size. It has been the practice heretofore to mount such pumps as an auxiliary pump group on the engine base frame, all said pumps being driven from a specially-provided shaft extending parallel to the main engine shaft Because of the large dimensions of the pumps this arrangement has the drawback of making the engine couplings difiicult of access through the inspection doors or openingsprovided therefore. W Dieselengines of the type to which thisl'invention relates generally includebanks or lines of cylinders each bank operating a related crankshaft, and all the crankshafts driving a common speed-converter (reducer or multiplier) gearing.

It is an object of this invention to improve the general arrangement of high-powered diesel engine units of the type described, and more particularly to mount the auxiliary pumps thereof in such a way as to improve accessibility of the engine-couplings reduce the overall dimensions of the diesel plant and do away with the special pump-driving shaft necessary in prior installations.

With the above and further objects iniview, my invention essentially consists of mounting the auxiliary pumps in a diesel unit including a plurality of transversely spaced crankshafts driving a common speed-converter (i. e. -reducer or-multiplier) gearing, upon the casing of said gearing. Preferably moreover, the pumps are mounted in at least one line and each line of pumps is driven from a shaft which forms an extension of a timing shaft or camshaft of the engine.

It will be seen that this arrangement will completely clear the inspection doors of the engine frame of any obstruction, and moreover, will substantially reduce the over-all transverse dimension of the diesel plant, as the pumps will now be included within the transverse outer contour of the engine.

According to another feature or advantage of the invention, the usual cooling means fed from the cooling pump or pumps and serving to cool the engine, are also mounted on the speed-converter casing and are directly connected with the related pumps.

Some exemplary forms of embodiment of the invention will now be described with reference 4 Claims. (01. 123-'41.47)

to the accompanying diagrammatic drawings, given by way of illustration and not of limitation, and in which:

Fig. 1 is a partial elevation view of an improved diesel plant according to the invention;

Fig. 2 is an end view thereof; 0 4

Fig. 3 is an end view of another plant including cooling means mounted in accordance with the invention; 0

Fig. 4 is a side view of the plant shown in Fig. 3

and

Fig. 5 illustrates the same plant as seen the other side. 4

As shown in Figs. 1 and 2, a diesel engine! only part of the outlineof whichis shown comprises two vertically spaced crankshafts 2 and 3 each of whichfmaybe driven by a related bank or banks of cylinder and piston units as is now well-known: Thecranksliaft's 2 and 3 are connected throughclutch couplings 4 and 5 with corresponding input shafts of a speed-converter gearing unit, generally indicated at 6, and which may be a reducer or a multiplier gearing, depending on requirements. 'I'he'output shaft of the speed converter is shown at I.

The illustrative example shown relates to a marine engine, and accordingly three auxiliary pumps have been shown, a brine pump 8 for sea-water, a fresh-water pump 9 and an oil pump [0.

ll indicates a camshaft of the engine and 12 a fuel-intake pipe.

It will be seen that the three auxiliary pumps 8, 9 and It are mounted on a side of the casin of the speed-converter gearing 6 and are arranged in line so as to be driven off an extension of the camshaft II.

In the embodiment of Figs. 3, 4 and 5, the arrangement isgenerally similar, and correspondfrom ing elements have been given similar reference numerals as in Figs. 1 and 2. As shown in Figs. 3 and 4, there are provided on one side of the speed-converter casing 6 a brine pump 8, a freshwater pump 9 and an oil pump l0 driven from a camshaft I l of the engine I, and there is; moreover provided a water-cooling unit [3 connected with the water pump and an oil-cooling unit [4 connected with the oil pump, both these cooling 0 units being also mounted on the same side of the 3 shaft 2 rather than with the lower crankshaft 3 thereof. In this case the cooling units I3 and I 4' are mounted below rather than above the related pumps 8' and Hi.

It will be understood that the invention is by no means limited to any of the details of embodiment shown in connection with the two constructions selected for'exemplification of the invention, and that many modifications may be made therein within the scope of the ensuing claims.

What I claim is:

1. In a diesel plant of the type specified, a multi-crankshaft engine unit, a speed-converter gearing unit aligned with said engine unit to be driven from said crankshafts andhavinga casing, auxiliary pumps for said engine mounted on said gearing casing on a side thereof and cooling means associated with at least some of said pumps, said cooling means mounted on said gearing casing adjacent to-the related pumps and directly connected with said pumps to be driven therefrom.

2. In a diesel plant of the type specified, a multi-crankshaft engine unit including at least an upper crankshaft and at least a lower crankshaft and camshafts associated with said crankshafts, a speed-converter gearing aligned with said engine unit to be driven from the crankshafts thereof and having a casing, a first line of auxiliary pumps for said engine associated with said upper crankshaft mounted on said gearing casing and cooling means mounted on said gearing casing adjacent to and below said pumps and connected therewith to be supplied therefrom, and a second line of auxiliary pumps for said engine associated with said lower crankshaf-t mounted on said gearing casing and cooling means mounted on said aring casing adjacent 4 to and above said related pumps and directly connected therewith to be supplied therefrom.

3. Diesel plant as in claim 2 wherein said first line of auxiliary pumps and associated cooling means are mounted on one side of said gearing casing towards the top thereof and said second line of auxiliary pumps and associated cooling means are mounted on the other side of said gearing casing towards the base thereof.

4. In a diesel plant of the type specified, a multi-crankshaft engine unit comprising related crankshafts and. at least one camshaft, a speedconverter gearing unit situated in line with said engine unit, said crankshafts abutting in said speed converter, a casing for said latter and auxiliary pumps for said engine unit mounted on a lateralrwall of said gearing casing and being substantially included within the transverse contour of said plant, without projecting outside thereof, and a pump-drive shaft forming an extension of one of said camshafts and driving the pumps in said line.

GUSTAV PIELST-ICK.

REFERENCES CITED The following references are of record in the file of thispatent:

UNITED STATES PATENTS Number 1,829,195 Simmen Oct. 27, 1931 

